Sams Teach Yourself C in 21 Days

4. Continuing with the array declared in question 3, what does the expression
   array[0][0]mean?


5. Again using the array from question 3, which of the following comparisons is true?
   array[0][0] == &array[0][0][0];
   array[0][1] == array[0][0][1];
   array[0][1] == &array[0][1][0];


6. Write the prototype for a function that takes an array of pointers to type charas its
   one argument and returns void.


7. How would the function that you wrote a prototype for in question 6 know how
   many elements are in the array of pointers passed to it?


8. What is a pointer to a function?


9. Write a declaration of a pointer to a function that returns a type charand takes an
   array of pointers to type charas an argument.


10. You might have answered question 9 with
    char ptr(char x[]);
    What is wrong with this declaration?


11. When defining a data structure to be used in a linked list, what is the one element
    that must be included?


12. What does it mean if the head pointer is equal to NULL?


13. How are single-linked lists connected?


14. What do the following declare?
    a.int *var1;
    b.int var2;
    c.int **var3;


15. What do the following declare?
    a.int a[3][12];
    b.int (b)[12];
    c.int c[12];


16. What do the following declare?
    a.char z[10];
    b.char y(int field);
    c.char (*x)(int field);

436 Day 15

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